东方百合索邦叶烧发生情况调查研究

为降低东方百合索邦发生叶烧的概率,对鳞茎周长、鳞茎储存时间、易感病时期土壤平均温度与百合叶烧之间的关系进行了研究。结果表明:储存时间相同,鳞茎的周长越长,越易发生叶烧;鳞茎周长相同时,种球的储存时间越长,越易发生叶烧;在百合生长的关键时期,土壤温度长期偏低,尤其是长期低于12℃,易发生叶烧。     

渝西地区火烧迹地不同植被恢复方式下的物种多样性动态

以“空间序列”代替“时间序列”的方法对渝西地区不同恢复方式下不同年龄的火烧迹地进行了调查研究,结果表明：火烧迹地的植被均匀度、丰富度和Shannon-Wiener指数等随恢复年限的变化曲线在人工恢复和自然恢复两种情况下有很大差异.实验中看不出两种恢复方式的不同是否能决定群落最终的物种多样性水平,但是不同的恢复方式可以加快或减缓物种多样性恢复的过程.实验还表明：在人工恢复的35年以内,多样性的恢复是一个“S”形变动的过程.人工恢复可以缩短灌木丛阶段的年限,加快乔木层的建成,同时促使该类型林区更长时间的停留在针叶林阶段,推迟该林区向顶级群落的演替进程;在自然恢复的40年以内,多样性的恢复是一个逐渐上升的过程,在最初的8年以内,其多样性不如人工恢复,但在恢复40年左右的时候,其多样性却可以达到一个比人工恢复高很多的水平.     

W火焰锅炉燃用劣质煤的燃烧调整——以大唐华银株洲发电有限公司为例

针对煤源严重不足,对1025t/h W型火焰锅炉进行最大限度使用本地攸县劣质煤的掺烧调整试验.通过对一次风速、风温,送风量及二次风挡板,消旋叶片、乏气风挡板,以及入炉煤的混合掺烧方式等方面的调整和试验.使锅炉具备了掺烧75％攸县劣质煤的能力,适应煤种的能力大大增强.     

复方沙棘油擦剂对动物烧伤烫伤及创伤的实验研究

本文利用复方促愈灵擦剂建立家兔烧伤、烫伤及创伤模型．涂抹促愈灵擦剂。结果显示促愈灵擦剂治疗烧伤、烫伤及创伤，可使烧伤、烫伤及创伤皮肤痊愈，较对照组时间缩短，无渗出液，皮肤平整光滑。说明促愈灵擦剂具有消炎、促进组织再生作用。     

Optimum Nutrient Level on Growth,Flowering, and Rhizome Production in Curcuma

ABSTRACT

This study investigated the effect of liquid fertilizer treatments on growth, flowering, leaf mineral content, and rhizome production during forcing of Curcuma alismatifolia ‘Chiang Mai Pink’ and C. thorelii ‘Chiang Mai Snow’. Plants were irrigated with 200 mL of 1.3 g L^?1 of 15 nitrogen (N) -7 phosphorus (P) -14 potassium (K) water soluble fertilizer at 0, 1.3, 2.7, 4.0, 5.3, or 6.6 g L^?1 weekly. Days to flower, flower stem length, and leaf length were recorded, the mineral contents in leaves were analyzed, and the number of rhizomes with tuberous roots were recorded at harvest. Flowering of the first inflorescence in both C. alismatifolia ‘Chiang Mai Pink’ and C. thorelii ‘Chiang Mai Snow’ was significantly delayed when plants received 6.6 g L^?1 fertilizer as compared to the control plants. The number of rhizomes with more than 4 tuberous roots was highest when plants received 2.7 g L^?1 fertilizer. No medium-sized rhizomes with more than seven tuberous roots were produced when ‘Chiang Mai Pink’ plants received 0, 4.0, 5.3, and 6.6 g L^?1 fertilizer. Based on the production of rhizomes with four to six tuberous roots, optimum concentration of 15N -7P -14K water soluble fertilizer is 2.7 g L^?1 for C. alismatifolia ‘Chiang Mai Pink’ and 1.3 to 4.0 g L^?1 for C. thorelii ‘Chiang Mai Snow’. Although high boron content occurred only in the outer part of the second leaf when fertilizer concentrations were increased, leaf-margin burn (LMB) symptoms were not observed in both species and this could not be related to the production of rhizomes.     

Mastication and prescribed fire impacts on fuels in a 25-year old ponderosa pine plantation, southern Sierra Nevada

Due to increases in tree density and hazardous fuel loading in Sierra Nevadan forests, land management is focusing on fuel reduction treatments to moderate the risk of catastrophic fires. Fuel treatments involving mechanical and prescribed fire methods can reduce surface as well as canopy fuel loads. Mastication is a mechanical method which shreds smaller trees and brush onto the surface fuel layer. Little data exist quantifying masticated fuel beds. Despite the paucity of data on masticated fuels, land managers desire fuel loading, potential fire behavior and fire effects such as tree mortality information for masticated areas. In this study we measured fuel characteristics before and after mastication and mastication plus prescribed burn treatments in a 25-year old ponderosa pine (Pinus ponderosa C. Lawson) plantation. In addition to surface fuel characteristics and tree data collection, bulk density samples were gathered for masticated material. Regressions were created predicting masticated fuel loading from masticated fuel bed depth. Total masticated fuel load prior to fire treatment ranged from 25.9 to 42.9 Mg ha⁻¹, and the bulk density of masticated fuel was 125 kg m⁻³. Mastication treatment alone showed increases in most surface fuel loadings and decreases in canopy fuel loads. Masticated treatment in conjunction with prescribed burning reduced both surface and canopy fuel loads. Detailed information on fuel structure in masticated areas will allow for better predictions of fire behavior and fire effects for fire in masticated fuel types. Understanding potential fire behavior and fire effects associated with masticated fuels will allow managers to make decisions on the possibility of mastication to create fuel breaks or enhance forest health.     

自体微粒皮移植在大面积Ⅲ度烧伤切痂创面治疗中的应用

目的：观察自体微粒皮移植在大面积Ⅲ度烧伤切痂创面治疗中的应用效果。方法：应用自体微粒皮加异体皮或异种皮修复大面积Ⅲ度烧伤切痂创面48例。结果：48例大面积Ⅲ度烧伤患者中46例存活,除1例因坏死组织未彻底切除致微粒皮成活率差外．余45例微粒皮成活及覆盖创面比均在95％以上。随访1.5～2a,愈合的创面平整、光滑、瘢痕增生较轻、有弹性。结论：自体微粒皮移植治疗大面积Ⅲ度烧伤切痂创面．效果良好。